Lawyer

A lawyer (also known as an attorney, advocate, or litigator) was a person who represented the interests of a person or group, for example, in a court of law. They also defended or prosecuted in Starfleetcourt martial cases. (TOS: "Court Martial")

"Conservator" was the Cardassian equivalent of a criminal defense lawyer, although his role was actually not to acquit the accused but rather to prepare the accused to acknowledge and confess the crime(s) charged. The accused was also advised by a Nestor, who was an officer of, but not allowed to address, the Cardassian court. (DS9: "Tribunal")